Cassette



FIG. 1 is a front perspective view of a cassette;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines show portions that form no part of the claimed design.

The back of the cassette forms no part of the claimed design. 

CLAIM The ornamental design for a cassette, as shown and described. 